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Numerical technique to reduce cross-coupling in acoustical arrays.
B Cugnet1, A C Hladky, J Assaad
1Institut d'Electronique et de Microélectronique du Nord, UMR CNRS 8520, Département OAE, Université de Valenciennes et du Hainaut Cambrésis, France. boris.cugnet@isen.fr
Ultrasonics
|August 6, 2002
Summary
Finite element method (FEM) optimizes piezoelectric transducer arrays by calculating potentials to minimize acoustic cross-coupling between elements. This method enhances directivity patterns for improved performance.
Area of Science:
- Acoustic Engineering
- Materials Science
- Electrical Engineering
Background:
- Piezoelectric transducer arrays are crucial for various applications, but acoustic cross-coupling can degrade performance.
- Optimizing the far-field directivity pattern of individual elements is essential for array functionality.
Purpose of the Study:
- To investigate the applicability of the finite element method (FEM) for optimizing the directivity pattern of individual elements in a piezoelectric transducer array.
- To develop and test an FEM algorithm for minimizing acoustic cross-coupling.
Main Methods:
- The finite element method (FEM) was employed to calculate optimal electrical potentials.
- The algorithm determined potentials for neighboring elements to minimize acoustic cross-coupling for a target element.
- A five-element array using PZT-5H material was used for feasibility testing.
Main Results:
- The FEM algorithm successfully calculated electrical potentials to minimize acoustic cross-coupling.
- The proposed method demonstrated feasibility in optimizing the directivity pattern of an individual element.
- A reduction in acoustic cross-coupling was achieved through potential adjustments.
Conclusions:
- The finite element method is a viable approach for optimizing piezoelectric transducer array element directivity.
- The developed FEM algorithm effectively minimizes acoustic cross-coupling, enhancing array performance.
- This technique offers a pathway to improved control over individual element behavior in transducer arrays.